Back to EveryPatent.com
United States Patent | 5,607,244 |
Satoh ,   et al. | March 4, 1997 |
A printer using a thermal ribbon to print on paper with a thermal head facing a platen with a ribbon supply core and take-up core with the head between the cores wherein a tension member contacts and biases the ribbon in a direction to give tension and is rotated in a retracted direction by a ribbon feed force against a biasing force by the tension member when the ribbon is fed and a plate spring supported on the tension member gives a rotational load to the supply core and a release member separate from the head contacts the ribbon on the platen side of a tangent line of the platen at the printing position whereby a push-up force of the paper in contact with and supported by the release member prevents lowering of print quality as the push-up force is not applied to the thermal head.
Inventors: | Satoh; Mitsuyoshi (Shibata-machi, JP); Oshino; Genji (Shibata-machi, JP) |
Assignee: | Tohoku Ricoh Co., Ltd. (Miyagi, JP) |
Appl. No.: | 409887 |
Filed: | March 22, 1995 |
Dec 29, 1988[JP] | 63-171242 U | |
Dec 29, 1988[JP] | 63-334837 | |
Dec 29, 1988[JP] | 63-334838 |
Current U.S. Class: | 400/247; 400/248 |
Intern'l Class: | B41J 033/32 |
Field of Search: | 400/208,208.1,219,219.1,234,248,247 |
4507666 | Mar., 1985 | Kondo et al. | 400/248. |
4616943 | Oct., 1986 | Matsumoto et al. | 400/247. |
4834563 | May., 1989 | Ozawa et al. | 400/247. |
Foreign Patent Documents | |||
0176009 | Apr., 1986 | EP | 400/234. |
0224567 | Nov., 1985 | JP | 400/247. |
0224566 | Nov., 1985 | JP | 400/248. |
0084265 | Apr., 1986 | JP | 400/248. |
0037976 | Feb., 1988 | JP | 400/248. |
2161757 | Jan., 1986 | GB | 400/248. |